Piling



Oct. 2.2, 1935. lo, GRAVE 2,018,625

`P1L1NG original Filed Feb. s', 1932 OTTO @R41/E,

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Patented Oct. 22, 1935 UNITED STATES PILING Otto Grave, Peine/Hanover, Germany AContinuation of application Serial No. 590,693, February 3, 1932. This application August 2,

1935, Serial No. 34,425. 1933 1 Claim.

This invention relates to piling constructions, and more particularly to double-Walled piling adapted to be used in strengthening or fortifying the banks of rivers, building of piers, bridges and the like, and is a continuation of the invention disclosed in my col-pending application, Serial No. 590,693, iiled February 3, 1932.

It has heretofore been common to use metallic pilings of various cross-section, such as the common Z-bar piling, I-beam piling and T-beam piling. Generally in the prior art, so far as I am aware, metallic pilings have been provided with complicated designs of interlocking terminal edges which, due to their design, either were formed by very diicult rolling operations or by machining. The forming of the more or less complicated interlocks on the prior1 art piling resulted in a high cost of manufacture, and furthermore, due to the complicated design, such interlocks functioned poorly in driving the piling.

The thumb and nger interlock used on piling is the most common interlock, and while many variations and details of this interlock have been designed in all cases of which I am aware, such interlocks were subject to jamming during the driving of the piling, and in many cases these interlocks spread so as to make a discontinuous Wall.

The present invention overcomes all of the objections of the prior art piling and, in addition, provides a double-wall piling construction of extreme strength. Ihe piling is composed of individual H-beam units of substantially the same dimension across the anges and from flange to flange,which beams are designed so as to permit rolling on a well known standard form of H-beam mill, such as the Grey beam mill or the Carnegie beam mill. 'I'he interlock portion of each piling unit is in the form of an integral ribI formed by thickening the flanges from their longitudinal edges inwardly on their outer faces only. The units are adapted to be connected by a connecting bar interlocking with the ribs of adjacent piling units.

Another feature of my invention is the provision of a piling unit which is substantially symmetrical about its longitudinal axis so as to permit driving of the unit without the tendency to twist or turn.

In the drawing:

Figure 1 is a plan View of a length of piling structure made in accordance with my invention.

Figure 2 is a transverse sectional View of one of the piling units, showing in ldotted lines the application of the rolls of a rolling mill used in producing the unit.

In Germany July 31,

Figure 3 is a transverse sectional view of one of the connecting bars.

Referring more particularly to the drawing, the letter A designates the H-beam piling unit as a whole which is composed of a web I and flanges 2. The beam A is substantially symmetrical about its longitudinal center line and has substantially the same overall dimension from edge to edge of each Web and from the outside face of one web to the outside of the next web, so that it is a true H-beam section. Each of the piling units A has the outer face of each flange thickened materially for a relatively short distance from the longitudinal edge of the flange inwardly toward the web, as at 4, to form locking ribs, while the inner faces of the flanges 2 are straight and parallel with each other.

In the rolling of the H-beam piling units the mill is provided with rolls 5 and 6 having horizontal axis and adapted to work the web I of the beam, while the rolls 9 and I0 are provided having vertical axis and adapted to Work the flanges of the beam. In order that the rolls 5 and 6 may operate on the web I, it is essential that no proj ection be formed on the inner faces of the iianges, otherwise it would be impossible to enter the rolls 5 and 6, or withdraw the same.

In order to connect the H-beam piling units A together to form a piling Wall as shown in Figure 1, I provide one-piece substantially H-shaped connecting bars B having a Web portion I2, an outer flange I3 and an inner ange I4. The outer flange I3 of the bars B had a width substantially coextensive with the combined width of the locking ribs of the adjacent piling units to be connected, plus the Width of the web I2 of the connecting bar. The piling units A arey driven closely adjacent each other so that the webs I2 of the b ars B substantially ll the space between the edges of the Webs of the adjacent piling units. The outer flange I3 of the connecting bar has its inner face shaped so as to follow the shape of the locking ribs on the piling units A, while the inner ange I4 of the connecting bar is provided with parallel faces which closely t the straight inner faces 4.5 of the ilanges 2 of the piling units.

The piling units may be driven in any manner desired, however, it is generally the practice to assemble a unit with connecting bars on one side of its flanges before driving, either at the time 50 of manufacture or at the place of driving, and the unit A with its bars on one side of the flanges is then connected to a previously driven unit by passing the connecting bar over the free edges of the flanges of the previously driven unit, and the 55 unit and connecting bars are then driven simultaneously. The absence of grooves in the piling units facilitates the driving operation, since grooves are subject to become jammed with sand, earth and the like during driving of the piling unit and at times to positively prevent the driving of the next adjacent unit. Y

While I have shown and described one specific embodiment of my invention, it is understood that I do not wish to be limited thereto, since various modifications may be made Without departing from the scope of my invention, as defined in th appended claim.

I claim: Y

A metal piling structure comprising, in combination, one-piece H-shaped sections substantially symmetrical about their longitudinal axis and capable of being rolled to finished size and shape and having parallel faced flanges, Isaid sections being arranged side by side with the longitudinal edges of their flanges adjacent each other, said flanges having their outer faces only materially thickened for a relatively short distance from their longitudinal edges toward the Webs of said sections to form locking ribs, and one-piece substantially H-shaped connecting bars having a dimension in a direction parallel with the flanges of said sections substantially :3o-extensive with l0 said locking ribs and constructed and arranged so that their flanges embrace both the inner and outer faces of the flanges of said sections and interlock with said locking ribs and the Webs of said bars substantially filling the space between the l5 adjacent longitudinal edges of the flanges of said sections.

O'I'IO GRAVE. 

